Calendar.



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.PATENTED MAR. 5, 1907.

R. G. & P. SELLERS.

CALENDAR.

APPLICATION FILED MAY 9, 1906.

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No. 846,250. PATLNTLD MAR. 5, 1907. R. G. & P. SELLERS. CALENDAR.

APPLICATION FILED MAY 9,1906.

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UNITED STATES PATENT oFEIcE'.

RICHARD C. SELLERS, OF SWARTHMORE, PENNSYLVANIA, AND PHILIP SELLERS, OF MERIDEN, CONNECTICUT; SAID PHILIP SELLERS ASSIGN OR TO SAID RICHARD C. SELLERS.

CALENDAR.

Specification of ,Letters Patent.

Patented March 5, 1907.

Application led May 9, 1906. Serial No. 315.966.

To a/ZZ whom it may concern:

Be it known that we, Riel-IARD C. SELLERS and PHILIP SELLERS, citizens of the United States, residing, respectively, iu Swarthmore, Delaware county, Pennsylvania, and Meriden, Connecticut, have invented certain Improvements in Calendars, of which the following is a speciiication.

Our invention consists in certain improvements in calendars of what is known as the perpetual type, by means of which it shall be possible to ascertain the day of the week upon which any given date falls in any particular month or year and which shall be of relatively simple construction as well as easily manipulated.

We further desire to provide a calendar having the characteristics above noted, in which by the suitable setting of two disks upon which are indicated, respectively, the varlous years and months it shall be possible to display the particular arrangement of the days of a given month and year in order to ascertain not only the number of days in said month, but also the particular days of the week upon which any given date or dates in such month fall.

These and other advantageous ends we secure, as hereinafter set forth, reference being had to the accompanying drawings, in which- Figure l is a front-elevation of one form of our improved calendar. Fig. 2 is a vertical section taken on the line 2 2,.Fig. l. Fig. 3 is a plan of the disk upon which are marked the months and the various numerals correspending to the number of days in any given month. F ig. 4 is a plan of the disk upon which are marked the years within the limits of which the calendar is available for use` Fig. 5 is afront elevation of a modified form of our calendar. I Fig. 6 is a vertical section taken on the line 6 6, Fig. 5. Fig. 7 is a plan of the strip upon which the various years are marked in the modified form of our invention shown in Fig. 5, and Fig. 8 is a lan of the stri upon which are marked tlie months an numerals indicating the number of days in any given month in the modiiie'dform of our invention.

Referring to Figs. l to 4 of the above drawings, A is a frame consisting of two still others thirty-one,

Rcvolubly carried upon a pin a? within the frame between the front and back e and a. is

a relatively large disk B, preferably having teeth b on its periphery and so .placed that its edge projects beyond the upper edge of the irame, as shown in Figs. l and 2.; This vdisk is divided into a number of elongated and relatively narrow segments by means of radial lines radiating and has withinit a number of series of numerals each arranged on a circular arc eccentric to the center of the disk or in a spiral line. Each series of numerals on any one spiral line includes all the numbers from l to 28, and while certain of said lines have but twenty-eight numerals others have twenty-nine, others thirty, and The numbers of any series are arranged consecutively upward from l, as noted, and it will be seen thatV each series begins seven radial divisions from the one preceding it, its l'irst number'bein placed on the inner side of the eighth numera of said preceding series. On certain of the radial spaces ol this disk are placed the names of the months, the positions of these latter being predetermined relatively to the various series of numeralsadjacent to them. For the purpose of properlyascertaining the dates of the various days of the week of the first two months of a leap-year it will be seen that there are two radial spaces marked "January and two others marked February, one of each of these spaces, however, being marked with a star, as shown, to indicate that such space is to be used only when i the year under consideration is a leap-year.

In addition to the disk B there is a second disk C concentric therewith and revolubly carried upon a button or knob c, journaled in any desired manner in the front sheet a of the frame, so as to be movable independently of the disk B by means of said knob. This latter disk is provided with anumber of elongated radial divisions respectively marked to indicate the years. Said year-numerals are laced together in groups of four with a blan division between them except in the case of the IOO numerals between and including, 1896 and 1903, which are in one group of eight numerals, because of the fact that the year 1900 was not a leap-year. It will of course be understood that the necessity for similar arrangement will arise only at the end of a century.

Between the periphery of the disk C and the circle upon which the year-numerals are placed we form elongated slots or openings c', which, it will be seen, are arranged on every seventh radial division. i The various leapyears are indicated by means of dots c2. The names of the various months on the disk B are placed at the same distances from the center of said disk as are the slots of the disk C, so that when said disks are placed one above the other saidnames of the months are visible through said slots.

In addition to the above construction we cut away certain portions of the front or cover piece a of the calendar, as shown in Fig. 1, first by forming a slot, as indicated at a, of the same size and-at the 'same distance from the center of support of the two disks B and C as is the circle on which the various year-numerals are marked,-so that when the parts of the device are assembled with the two disks in the position shown in Fig. 2 one of said year-numerals will be visible through said slot a3, which is of a width substantially equal to the width of one of the radial divisions of either of the disks.

In addition to the above the portion a of' the frame isalso cut away to a width of seven radial divisions at a distance from the center' of revolution of the disk equal tothe radius ol the circle upon which are placed the names of the months on the disk B and of the openings c of the disk C. Radially this opening extends from the inner edge of" the circle upon which the names of the months are placed to the circle upon which is placed the outermost of the spirally-arranged numerals, there being, however, a bridge-piece a? cut on the arc of a circle concentric with the disks and extending from side to side of this opening, so as to divide it into two parts af" and af. Y In the first of these the lname of one of the months may be visible through one of the slots c', and in the second opening is seen a group of numerals corresponding to the number of days in the month so disclosed. This bridge-piece a* is divided into seven parts marked to indicate the days of the week.

Under operating conditions in order to ascertain the particular number and arrangement of days in any month of any year whose number appears upon the disk C the knob c 1s first turned until the particular year in question is visible through the slot e3. The disk B is then turned by means of its toothed edge, which, as before noted, projects beyond C and B in such manner as to give the same indications as are obtainable with the arrangement of' parts shown in Figs. 1 to 4, inclusive. The strip C is provided with a number of parallel divisions or sp aces extending at right angles to the direction of its.

length, for the most part arranged in groups of tive, of which every four are marked with numerals indicating the years. As before, there is one group of eight numerals corresponding to the years 1896 to 1903, inclusive. Itlongated slots c extend inwardly from one edge of this trip on every seventh space.

Upon the strip B there are, in addition to a series of transverse parallel spaces corresponding in number to the spaces upon the strip C', a number of inclined spaces outlined by lines drawn at an acute angle to the line of said strip, forming with the transverse spaces approximately rectangular figures .on each of which is placed a numeral. Said numerals are arranged to extend between the inclined lines in series, some of which contain twenty-eight numbers, while, as in the other form of our invention, certain other series contain twenty-nine, others thirty, and others thirty-one numbers. Bearing predetermined relation to these inclined series of numerals are placed the names of the months, preferably in certain of the transverse spaces. The front piece a? of the frame is cut away to provide a rectangular opening, at the lower edge of which is a slot a, so placed relatively to the guide for the strip C that through it may be-visible the year-numbers on said strip. The upper edge of this strip C', in which are formed the slots c', extend across the lower portion of the main opening or hole in the front piece a7, while through the remainder of said opening are visible certain groups of the inclined lines or series of numerals, indicating the days of the months corresponding to the particular month whose names is visible through one of the slots c. The upper edge of the main opening in the piece a7 is divided into seven parts, marked to indicate the days of the week, and the width of these parts corresponds to the width of the transverse spaces upon the strips C and B.

The operation of this form of our invention is similar to that described in connection the upper edge of the frame until the name of with Figs. 1 and 4. The strip C being lOC moved longitudinally, any particular year desired is visible through the slot a3, after which the strip B is similarly moved until the particular month of the year in question is visible through one of the slots c of said first strip. As before, the various leapyears are marked by dots c2, while the names of the first two months for use with any leap-year are similarly marked with a dot.

We claim as our invention l. A calendar consisting of a frame, ltwo coperating movable pieces therein, one of said pieces having marked on it the numerals corresponding to a number of years and the other having on it a number of series of numerals corresponding in number to the days of the month, said latter piece also having on it the names of the various months, the frame being provided with symbols indicating the days ofthe week and being constructed to coperate with both pieces to render visible the name of a month, the group of numerals `corresponding in number to the number of days in said month, as well as the numerals of a single year, being also visible through the frame, substantially as described.

2. A calendar consisting of a frame having two movable pieces therein, one of said pieces having on it numerals for indicating the years and having openings bearing a definite position relatively to said numerals, the other piece having on it the names of the months so placed as to be visible through said openings in the first piece, there being on said second piece a number of series of numerals for indieating the days of the month and the frame having in it an opening or openings for rendering visible the numerals of' any one year and also the name of` that month which is visible through one of the openings of one off the movable pieces, said opening being shaped to permit a definite and predeter` mined group of numerals indicating the days of the month to be visible corresponding to the particular month whose name is visible, substantially as described.

3. The combination in a calendar of a frame and two pieces movably supported therein, the first of said pieces having a number of spaces certain of which are marked to indicate years, there being openings through said piece at definite distances apart and definitely placed relatively to the year-markings, the second piece being divided into similar spaces certain of which are marked to indicate the names of months, there being a number of' series of numerals indicating the days of the month distributed indefinite positions in .said spaces, said pieces being positioned in the frame so that the first piece is over the second piece and the names of the months on the second piece are visible through the openings in the first piece, there being an opening or openings in the frame to render visible thedesignation of a single year and also seven of the spaces containing numerals indicating the days of' the month, substantially as described.

4. A calendar consisting of a frame, two disks revolubly supported therein, means for turning the disks at will, one disk being provided with markings arranged in a circle to indicate years and also having openings adjacent to certain of said markings, the second disk being divided into a series of spaces containing the numerals of a number of series for indicating the days of the month and also having in certain of the spaces the names of months placed to be visible through the openings in the first disk, there being openings 1'n the frame to render visible any particular year, the name of any month therein, and a group of the numerals corresponding to the number of days in said month, substantially as described.

5. A calendar consisting of' a frame, two disks revolubly supported therein, means for turning the disks at will, one disk being provided with markings arranged in a circle to indicate years and also having openings adjacent to certain of said markings, the second disk being divided into a series of spaces containing the numerals of a number of series for indicating the days of the month and also having in certain of the spaces the names of: months so placed as to be visible through the openings in the first disk, the numbers for indicating the days of the month being arranged on spiral lines definitely placed relatively to the names of the months, there being openings in the frame to render visible any particular year, the name of any month therein, and a group of the numerals corresponding to the numberof days of said month, substantially as described.

6. A calendar consisting of' a frame, a pair of disks revolubly supported therein, the first of said disks having numerals arranged in a circle to indicate the years and being provided with a series of openings definitely placed relative to said years, a second disk having a series of radially-extending spaces, a number of series of numerals arranged on said second disk in spiral lines, of which the numerals of each series are placed seven spaces from the series next adjacent to it, certain of said spaces being marked with the names of months, the frame having openings, of which one is placed to permit a single year on the first disk to be visible, the other opening being placed and constructed to permit the name of a month to be visible in any of seven positions and a third opening formed to render visible the numerals of any seven of the radial spaces of' the second disk and being marked to indicate the days of the week, substantially as described.

IOO

IlO

" 7. A calendarconsisting of a frame, two l In testimony Wlfereof We have signed our 1o independently-revoluble disks eonoentioally naines to this speoieation in the presence of supported therein7 one hliaylfing 1on t the two subscribing Witnesses. naines and da s of mont s t 1e ot Ier swing i on it the yearsrthe frame having on it indiea- S' tions for the days of the Week and being formed to permit only certain groups of the l days ofthe month to be visible, substantially' as described.

Witnesses WILLIAM E. BRADLEY, Jos. H. KLEIN. 

